Hemi-epiphytic vine. Stem green, internodes 1.5-8 cm long. Prophyll 18-25.5 x 4-5 cm, narrowly triangular, pale green. LEAVES: Petiole 13.5-46 cm long. Leaf blade 20-45 x 5-15 cm, narrowly ovate to ovate-triangular, apex rounded to sub-acute, base sagittate with extrorse lobes, distinctly paler on lower surface, chartaceous; anterior division 25.5-32 x 13.5-23 cm, primary lateral veins 5-8 per side; posterior divisions 5-11 x 6-12 cm, acroscopic veins 2 per side, basiscopic vein 1 per side; basal veins 1-3 per side, with one free to base; posterior rib naked for 0.3-0.5 cm. INFLORESCENCE: 1 per floral sympodium; peduncle 3.5-4.5 cm long. Spathe 8.5-12.5 x 2.5-3 cm, ovate, weakly constricted, white outside, cream with dark red base inside. Spadix 7.5-12 cm long, male zone, 3-6 cm long, male sterile zone 0.5-1 cm long, female zone 3.5-4.5 cm long. Flowers: stamens 1-1.2 x 0.8-1 mm; intermediate staminodes 2-4 x 1-2 cm; gynoecium 1-1.5 x 0.8-1 mm, ovoid, cream, ovary with 5-6 locules, ovules 2-5 per locule, placentation sub-basal. INFRUCTESCENCE: Berries immature, 1.5-2.5 x 1-1.5 mm, obovoid; seed 0.8-1 mm long, fusiform.
Endangered (EN), B1 a,b (i,ii,iii,iv); extent of occurrence = 1672 km2. Despite its rather wide extent of occurence, the known populations are found in areas of Atlantic forest near expanding towns or, in the case of the Represa do Grama, near aluminium mining. In Rio de Janeiro, it is protected within the Parque Nacional da Floresta da Tijuca and in the Reserva Biológica do Tinguá.